/*
 * Copyright 2024 LinQingYing. and contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * The use of this source code is governed by the Apache License 2.0,
 * which allows users to freely use, modify, and distribute the code,
 * provided they adhere to the terms of the license.
 *
 * The software is provided "as-is", and the authors are not responsible for
 * any damages or issues arising from its use.
 *
 */

package com.linqingying.cangjie.analyzer.lifetime

import com.intellij.openapi.Disposable
import com.intellij.openapi.application.ApplicationListener
import com.intellij.openapi.application.ApplicationManager


class NoWriteActionInAnalyseCallChecker(parentDisposable: Disposable) {
    init {
        val listener = object : ApplicationListener {
            override fun writeActionFinished(action: Any) {
                if (currentAnalysisContextEnteringCount.get() > 0) {
                    throw WriteActionStartInsideAnalysisContextException()
                }
            }
        }
        ApplicationManager.getApplication().addApplicationListener(listener, parentDisposable)
    }

    fun beforeEnteringAnalysisContext() {
        currentAnalysisContextEnteringCount.set(currentAnalysisContextEnteringCount.get() + 1)
    }

    fun afterLeavingAnalysisContext() {
        currentAnalysisContextEnteringCount.set(currentAnalysisContextEnteringCount.get() - 1)
    }

    private val currentAnalysisContextEnteringCount = ThreadLocal.withInitial { 0 }
}

class WriteActionStartInsideAnalysisContextException : IllegalStateException(
    "write action should be never executed inside analysis context (e,g. analyse call)"
)
